KR101167176B1 - Bobbin and method for winding coil using same - Google Patents

Abstract

PURPOSE: A bobbin and a coil winding method using the same are provided to obtain accurate sectional area and number of turns of a coil by inserting the middle of the coil to a penetrating groove and winding both ends of the coil in opposite directions. CONSTITUTION: A pair of flanges(120) are formed on both ends of a main body(110) and have respective radiation holes for releasing heat produced by a coil. Partition walls(131,132) are formed on the outer periphery of the main body, where a penetrating groove(140) is formed in a partition wall located in a first coil winding region(170). The middle of a first coil(150) is inserted in the penetrating groove.

Description

Bobbin and coil winding method using this bobbin {Bobbin and method for winding coil using same}

The present invention relates to a bobbin as a whole, and more particularly, when the coil is wound on the bobbin, the start and end turns are not left, so that the cross section and the number of turns of the winding can be precisely secured. A bobbin capable of eliminating the inconvenience of being fixed across a winding area and a coil winding method using the bobbin.

A transformer is a device for increasing or decreasing the voltage of an alternating current, in which a primary coil and a secondary coil are wound around a bobbin. In general, a low pressure coil called a primary coil is connected to an input circuit to change a voltage, and a high pressure coil called a secondary coil is connected to an output circuit using a changed voltage.

In such a transformer, when an alternating current of an input circuit passes through a primary coil, a magnetic field is generated by a magnetic flux whose intensity and direction change in response to the alternating current. This change in magnetic flux induces an alternating voltage in the secondary coil. Therefore, the transformer ratio of the transformer is mainly determined by the turns ratio of the primary coil and the secondary coil. The transformer ratio also varies with the thickness and shape of the core.

Figure 1 shows a schematic separation perspective view for explaining an example of the transformer according to the prior art. According to the structure of the transformer shown in FIG. 1, the upper and lower ends of the bobbin 10 made of plastic, for example, have a diameter that is generally extended to partition the winding regions of the primary coil and the secondary coil (not shown). The upper flange 12 and the lower flange 14 having is formed. Terminal pads 12a and 14a for electrical connection of the primary coil and the secondary coil are formed at one end of the upper flange 12 and the lower flange 14.

In the state in which the primary coil and the secondary coil are wound between the upper flange 12 and the lower flange 14 of the bobbin 10, upper and lower sides of the bobbin 10 are formed of, for example, a ferrite material, and generally 'E' The upper core member 20a and the lower core member 20b having a 'shape' are combined.

In the upper core member 20a and the lower core member 20b, both side ends 22a and 22b are insulated from each other in close contact with each other when assembled with the bobbin 10, and the central end 22c is the bobbin 10. Adjacent to each other through the hollow portion 16 of.

2 is a partially enlarged view illustrating a method of winding a coil on a bobbin in a transformer according to the prior art. Referring to FIG. 2, a conventional method of winding a coil 30 such as a primary coil or a secondary coil to the bobbin 10 will be described. First, one end of the terminal pad 12a or 14a (see FIG. 1) will be described. The coil 30 connected to the coil 30 is wound from the upper flange 12 or the lower flange 14 toward the center of the bobbin 10. The coil 30 is continuously wound in a constant direction, for example counterclockwise, to form a winding in a single layer or multiple layers. After the coil 30 is wound up to the predetermined winding area, the other end of the coil 30 is connected to the connection terminal of the terminal pad 12a or 14a.

However, when one end of the coil 30 is adjacent to the upper flange 12 or the lower flange 14 and the other end is located near the center of the bobbin 10 after the winding of the coil 30, as described above To connect both ends of the coil 30 to the terminal pad 12a or 14a at each end of the upper flange 12 or the lower flange 14, the other end side of the coil 30 wound as shown in FIG. It shall be fixed after crossing the winding area.

Accordingly, in the related art, a worker pulls out the other end of the coil 30 by hand or with a tape, and withdraws it toward the terminal pad 12a or 14a. In this case, the coil corresponding to the end turn according to the skill or situation of the operator The position at which 30 is fixed changes. As described above, when the position at which the coil 30 of the end turn is fixed is different according to the operator, the leakage flux is changed for each produced transformer, and the change of the leakage flux causes an even change in the transformer ratio of the transformer. Quality cannot be guaranteed.

Moreover, as shown in FIG. 2, when the coil 30 is wound around the bobbin 10, the start turn and the end turn remain, so that it is difficult to secure the cross-sectional area and the number of turns of the entire winding. In other words, the windings are not uniformly arranged, and in particular, in the case of winding more than two layers, the windings are alternately arranged and the number of unnecessary turns is increased, resulting in an increase in the height of the windings.

Accordingly, the present invention, when winding the coil to the bobbin does not leave the start turn and the end turn can ensure the cross-sectional area and the number of turns accurately, and also eliminates the inconvenience that the coil of the end turn is fixed across the winding area. An object of the present invention is to provide a bobbin and a winding method of the coil using the bobbin.

The bobbin according to the present invention includes a main coil, a pair of flanges formed at both ends of the main body, at least two or more partition walls formed on an outer circumferential surface of the main body between the flanges, and a primary coil winding in which the primary coil is wound. And a through groove formed in the partition wall within the region so that the primary coil can pass therethrough.

In the winding method of the coil using the bobbin according to the present invention, the step of having the above-described bobbin, inserting the intermediate portion of the primary coil into the through groove, the first portion of the primary coil having the through groove Winding along the partition, and winding the second portion of the primary coil in a direction opposite to the first portion along the partition with the through groove.

According to the present invention as described above, the bobbin is provided with a partition wall having a through groove formed so that the coil can penetrate, by inserting the middle portion of the coil into the through groove, and then winding both sides of the coil in the opposite direction to each other, Since the parts corresponding to the conventional start and end turns are not left, the cross-sectional area and the number of turns of the winding can be precisely secured, and the inconvenience of fixing the coil of the end turn across the winding area can be eliminated.

Accordingly, it is possible to ultimately ensure the quality of the product, to facilitate the winding of the coil to improve the workability, as well as to achieve the effect of improving the appearance of the winding arrangement is uniform.

1 is a schematic exploded perspective view for explaining an example of a transformer according to the prior art.
2 is a partially enlarged view illustrating a method of winding a coil on a bobbin in a transformer according to the prior art.
3 is a plan view of the bobbin according to the present invention.
4 is a perspective view from below of the bobbin shown in FIG. 3.
5 is a front view illustrating a method of winding a coil in a bobbin according to the present invention.
Figure 6 is an exploded perspective view for explaining the coupling with the core members after winding the coil in the bobbin according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

3 is a plan view of the bobbin according to the present invention, Figure 4 is a perspective view of the bobbin shown in FIG. As shown in these figures, the bobbin 100 according to the present invention includes a main body 110, a pair of flanges 120 formed at both ends of the main body 110, and a main body 110 between these flanges 120. Primary coil 150 on at least two or more partition walls 130 formed on the outer circumferential surface of the panel) and partition walls 131 in the primary coil winding region 170 to which the primary coil 150 is wound. It includes a through groove 140 formed to penetrate.

The main body 110 of the bobbin 100 according to the present invention is made of a material such as plastic, for example, and is a substantially tubular member having a hollow portion 111.

The pair of flanges 120 extend at right angles to the longitudinal direction of the body 110 at both ends of the body 110, and between these flanges 120 are primary coils 150 (FIGS. 5 and 6). The primary coil winding region 170 to which the winding) is wound, and the secondary coil winding region 180 to which the secondary coil 160 (see FIG. 6) is wound. Each flange 120 may be provided with a heat dissipation hole 121 for quickly dissipating heat generated from each of the coils 150 and 160 wound. In addition, each of the flanges 120, as will be described later with reference to Figure 6, when the core member 200 having a generally 'E' shape is to be coupled, such that the core member 200 is seated and At the same time, a guide 122 is formed to prevent rotation about the flange 120.

As shown in detail in FIG. 4, the through hole 123 allows the flange 120 adjacent to the secondary coil winding region 180 to extend through an end (not shown) corresponding to the start turn of the secondary coil. The guide 124 for guiding the end of the secondary coil to be positioned in a predetermined direction to the periphery of the through hole 123 may be formed at the same height as the guide part 122 and integrally connected thereto. Can be. The configuration of the through hole 123 and the guide 124 is particularly useful when the secondary coil winding region 180 includes only one flange 120 and one partition wall 132.

Unlike the foregoing, the primary coil winding region 170 and the secondary coil winding region 180 may be formed in the same or symmetrical shape and structure. Therefore, hereinafter, the primary coil winding region 170 will be described mainly for convenience of description.

The partition wall 130 is installed at right angles on the outer circumferential surface of the body 110 in parallel with the flanges 120 between the flanges 120. The partition wall 130 may have the same radial length as the flanges 120 (the length from the outer circumferential surface of the body 110 to the circumferential front end of the partition wall 130), but is not necessarily limited thereto. In addition, the spacing between the partition walls 130 or the spacing between either flange 120 and the partition wall 130 is preferably somewhat larger than the diameter of the coil to be received and wound therebetween.

In FIG. 3, a primary coil is formed in the partition wall 131 in the primary coil winding region 170 to which the primary coil 150 of the partitions 130 is wound, as shown by a solid line and a part by a virtual line. A through groove 140 is formed to be open to the circumferential front end of the partition 131 so that the 150 can pass therethrough. The width of the through groove 140 may be equal to or slightly larger than the gap between the partition walls 130. In addition, the depth of the through groove 140 may be equal to the radial length of the partition 131.

5 is a front view illustrating a method of winding a coil in a bobbin according to the present invention, and FIG. 6 is an exploded perspective view illustrating coupling of core members after winding a coil in a bobbin according to the present invention. Hereinafter, a method of winding a coil in the bobbin 100 according to the present invention will be described with reference to these drawings.

First, it is provided with the above-described bobbin 100 configured according to the present invention.

Subsequently, as shown in FIG. 5A, the primary coil is formed in the through groove 140 of the partition wall 131 in the primary coil winding region 170 partitioned in the main body 110 of the bobbin 100. Insert the middle part of 150. At this time, while the both ends of the primary coil 150 has a direction facing each other, the primary coil 150 is located in the primary coil winding region 170 in a substantially 'Z' or 'S' shape.

Next, the first wall 151, which is divided from the middle portion to the one end of the primary coil 150, is partitioned within a region partitioned by the partition wall 131 having the flange 120 and the through groove 140, for example. 131 is wound in a single layer or multiple layers.

In addition, the second portion 152, which is divided from the middle portion to the other end of the primary coil 150, for example, the partition wall having a partition 132 and the through groove 140, which separates the primary coil winding region 170 ( It is wound in a single layer or multiple layers along the partition wall 131 in the region partitioned by 131.

Here, for example, as shown in FIG. 5B, when the first portion 151 is wound counterclockwise, the second portion 152 is in a direction opposite to the first portion, that is, clockwise. Will be wound. Although the first part 151 and the second part 152 are wound in opposite directions, ultimately, the entire primary coil 150 may have the same effect as that wound in one direction, and both ends of the through groove are You will meet near (140).

Accordingly, there is an advantage that the inconvenience of crossing the winding area by bending one end of the coil so that both ends of the coil are connected to the terminal pad can be eliminated. In addition, when the coil is wound on the bobbin, starting and ending turns are not left, so that the cross-sectional area and the number of turns of the winding can be accurately obtained.

Similarly to the primary coil 150, the winding of the secondary coil (not shown) is similar to that of the secondary coil in the through groove formed in the partition wall in the secondary coil winding region partitioned in the main body 110 of the bobbin 100. After inserting the intermediate part, the first and second parts of the secondary coil may be wound in opposite directions.

Meanwhile, as illustrated in FIGS. 4 to 6, when the secondary coil winding region 180 includes only one flange 120 and one partition wall 132, the through holes 123 formed in the flange 120. In the state where the end (not shown) corresponding to the start turn of the secondary coil 160 is previously pulled out through), the secondary coil 160 is divided into several layers in the space between the flange 120 and the partition wall 132. Allow winding.

As described above, in the bobbin 100 according to the present invention, the separation distance between the primary coil 150 and the secondary coil 160 is always the same so that the leakage flux of the transformer is the same, so that the design variable of the transformer is reduced. Of course, the insulation is also improved and the quality of the product can be maintained evenly.

In addition, with the primary coil 150 and the secondary coil 160 wound between the flanges 120 of the body 110, both sides of the bobbin 100, as shown in FIG. Core members 200 formed of a ferrite material and generally having an 'E' shape are coupled to each other.

The core members 200 are insulated from each other and are insulated closely from each other when assembled with the bobbin 100, and the central ends 220 are connected to each other through the hollow part 111 of the bobbin 100. Adjacent to each other. In addition, by the guide portion 122, these core members 200 are seated on both flanges 120 of the bobbin 100 and at the same time prevent rotation about each flange 120.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

100: bobbin
110:
120: flange
130: bulkhead
140: through groove
150: primary coil
160: secondary coil
200: core member

Claims (15)

main body,
A pair of flanges formed at both ends of the main body,
At least two partition walls formed on an outer circumferential surface of the body between the flanges, and
Through grooves formed so that the primary coil can penetrate the partition wall in the primary coil winding region wound around the primary coil of the partition wall
Bobbin comprising a. The method of claim 1,
And a through groove formed to allow the secondary coil to penetrate the partition wall in the secondary coil winding region to which the secondary coil is wound. The method of claim 1,
A bobbin in which a secondary coil winding region is formed in which a secondary coil is wound by one flange and one partition wall. The method according to claim 2 or 3,
And each heat radiation hole is formed in each of the flanges for dissipating heat generated from each of the wound coils. The method according to claim 2 or 3,
Each of the flanges, the bobbin is provided with a guide portion for preventing the rotation of the flange at the same time the core member is seated when the core member is coupled to the bobbin. The method of claim 3,
And a through hole formed in the flange forming the secondary coil winding region so that an end portion corresponding to the start turn of the secondary coil can extend therethrough. The method of claim 6,
A bobbin is formed to guide the end of the secondary coil to be positioned in a predetermined direction around the through hole. The method of claim 7, wherein
The bobbin, wherein the guide is formed at the same height and integrally connected with the guide portion formed in the flange. The method of claim 1,
The barrier rib is installed at right angles on the outer circumferential surface of the body in parallel with the flanges between the flanges. 10. The method of claim 9,
The partition has a bobbin having the same radial length as the flanges. The method of claim 1,
The depth of the through groove is the same bobbin radial length of the partition wall. The method of claim 1,
The body has a bobbin having a hollow portion. Providing a bobbin with a through groove in a partition in a primary coil winding region of at least two partitions formed on an outer circumferential surface of the main body between a pair of flanges formed at both ends of the main body,
Inserting an intermediate portion of the primary coil into the through groove;
Winding the first portion of the primary coil along a partition wall having the through groove, and
Winding the second portion of the primary coil in a direction opposite to the first portion along a partition wall having the through groove;
Winding method of the coil comprising a. The method of claim 13,
When the bobbin has a through groove in the partition wall in the secondary coil winding region, an intermediate portion of the secondary coil is inserted into the through groove, and then the first and second portions of the secondary coil are opposite to each other. The winding method of the coil further comprising the step of winding. The method of claim 13,
When the secondary coil winding region of the bobbin is formed with one flange and one partition wall and the flange has a through hole, the end corresponding to the start turn of the secondary coil is previously removed through the through hole. Winding the secondary coil in a space between the flange and the partition wall.

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